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National Drinking Water Database


Total haloacetic acids (HAAs) in Illinois


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in Illinois

1,345 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Alto Pass Water District
Alto Pass, IL
1,03124 of 2463.39 ppb
(23.85 to 138.48 ppb)
2Pierron
Pierron, IL
1,80028 of 2860.66 ppb
(30.55 to 145.18 ppb)
3Smithboro
Smithboro, IL
2007 of 759.64 ppb
(17.2 to 98.2 ppb)
4West Brooklyn
West Brooklyn, IL
18611 of 1157.82 ppb
(23.78 to 101.2 ppb)
5Nauvoo
Nauvoo, IL
1,62122 of 2254.77 ppb
(26.45 to 130.6 ppb)
6Lake Williamson Christian Center
Carlinville, IL
1,25024 of 2454.07 ppb
(17.85 to 135.7 ppb)
7Findlay
Findlay, IL
8001 of 153.5 ppb
(53.5 ppb)
8Hilldale Manor Water Company
Ingleside, IL
4141 of 152 ppb
(52 ppb)
9Patoka
Patoka, IL
73120 of 2049.9 ppb
(14.1 to 133.85 ppb)
10Cooksville
Cooksville, IL
21321 of 2148.63 ppb
(5.68 to 153.3 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.450 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) in Illinois

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Illinois since 2004

Violation TypeNumber of Violations
Monitoring and Reporting Disinfection Byproduct Rule53
Over maximum contaminant level, Average45